I am a huge proponent of the DCC++ system. Which is quickly, a DCC base station made from an Arduino UNO and a motor shield. It's a cheap and easy way to get into DCC. 

A DCC++ group popped up on Facebook a week or so ago and a discussion started around boosters etc...

Yesterday, a young man (he is in High School) posted that he had developed a HAT for the Raspberry Pi that contained the Arduino chip and an H-Bridge capable of 5A output. This allows one to have a complete system running JMRI on the Pi with the DCC base station connected as a single unit AND producing a 5A output. He plans to charge about $50 for the board which will include all the SMD components soldered on but the end user would have to solder on the Rpi Header. It even comes with the DCC++ code flashed onto the board.

There is a post on it on the Trainboard DCC++ section: http://www.trainboard.com/highball/index.php?threads/new-dcc-hat.104707/#post-1011342

But there is greater discussion on the DCC++ Facebook Group: https://www.facebook.com/groups/1406785379394934/

 If one were to combine the image created that makes the Pi a JMRI access point, (https://mstevetodd.com/jmri-raspberrypi-access-point) for less than $100 you could have a fully functional system using WiThrottle.

GregW66